679879431 has 24 divisors (see below), whose sum is σ = 1224372864. Its totient is φ = 353183760.

The previous prime is 679879427. The next prime is 679879511. The reversal of 679879431 is 134978976.

It is a happy number.

It is not a de Polignac number, because 679879431 - 2² = 679879427 is a prime.

It is a super-2 number, since 2×679879431² = 924472081393767522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679879231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489841 + ... + 491226.

It is an arithmetic number, because the mean of its divisors is an integer number (51015536).

Almost surely, 2^679879431 is an apocalyptic number.

679879431 is a deficient number, since it is larger than the sum of its proper divisors (544493433).

679879431 is a wasteful number, since it uses less digits than its factorization.

679879431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981091 (or 981088 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 679879431 is about 26074.4977132830. The cubic root of 679879431 is about 879.3139586776.

The spelling of 679879431 in words is "six hundred seventy-nine million, eight hundred seventy-nine thousand, four hundred thirty-one".